. >> reporter: as fbi agents questioned shell, it became clear he was not part of any criminal plot, but instead the victim of perhaps a prank on his 29th birthday. >> that this was a hoax, and a pretty nasty trick was played on a passenger, and it resulted in really a threat to all of the passengers. >> reporter: an investigation into who made the call and why continues. >> it's just incredibly foolish and irresponsible thing to do. the bottom line it's criminal. >> reporter: and costly. u.s. air estimates the hoax will coast upwards of tens of thousands, a price tag that does not include the fears and frustrations of dozens of passengers hurried off the plane and onto later flights. jay gray, nbc news, dallas. >>> police in los angeles searched the home of a bank manager today after she was forced to help rob her own bank. investigators say two men kidnapped the woman from her home yesterday, strapped what they said was a bomb to her body, and forced her to get money from the bank. a bomb squad blew up the device. it turned out it was not a bomb. police say today's search was part